The King´s Indian Defence is a chess opening that begins 1.d4 Nf6 2.c4 g6. White usually continues with either 3.Nc3, 3.Nf3 or 3.g3, and Black plays 3...Bg7. (If Black plays 3...d5, the opening is a Grünfeld Defence). It is a "hypermodern" opening, where Black lets White take the center with the view to later ruining White´s "wonderful" position. It is a risky opening, which has been a favourite of aggressive players such as Gary Kasparov and Bobby Fischer. John Nunn, Svetozar Gligoric, and Wolfgang Uhlmann have also been known to play this opening often.

The main variations of the King´s Indian are the Classical, the Samisch, the Averbakh and the Four Pawn Attack.